Odpowiedź:
e)
Df = { 1/4 , 1/2 , 1 , 2 , 4 }
f(x) = (3 - log₄x)/5
f(1/4) = (3 - log₄1/4)/5 = [3 - (- 1)]/5 = (3 + 1)/5 = 4/5
f(1/2) = (3 - log₄1/2)/5 = [3 - (- 1/2)]/5 = (3 + 1/2)/5 = 3 1/2 : 5 = 7/2 * 1/5 = 7/10
f(1) = (3 - log₄1)/5 = (3 - 0)/5 = 3/5
f(2) = (3 - log₄2)/5 = (3 - 1/2)/5 = 2 1/2 : 5 = 5/2 * 1/5 = 1/2
f(4) = (3 - log₄4)/5 = (3 - 1)/5 = 2/5
ZWf: y = { 4/5 , 7/10 , 3/4 , 1/2 , 2/5}
